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Hello all,<br>
<br>
Sorry for this OT but nobody is answering in the pulseaudio IRC and
maybe some of you know about this problem.<br>
<br>
Under Ubuntu 14.04, I'm using a software that has a pulseaudio
output and I use pacat to record directly the sound coming from
pulseaudio like this:<br>
pacat --record --format=s16le --rate=48000 --channels=2
--file-format=wav --volume=32768 --latency-msec=100 -d
alsa_output.pci-0000_00_1b.0.analog-stereo.monitor &<br>
sleep 2.5 && killall pacat<br>
<br>
It is working well on the same machine with 12.04, but on 14.04
there is a problem. <br>
<br>
Some of the files are ~4 times bigger than expected. When I look at
them I see that sequences of zeros are randomly inserted in the file
thus increasing its size.<br>
This phenomena is happening as a group : for a few minutes,
recording ~50 files is fine, then for a long time, it is padded,
then it can be fine again...<br>
Looking closer to the file, it seems that there is some relation to
zero crossings: the time where zeros are inserted seems to be close
to zero value of the wave data.<br>
<br>
I've tried playing with format or piping to sox, the problem is
still happening.<br>
<br>
As a workaround I tried to trim all the silences, but I didn't
manage to use the sox command for that:<br>
<meta charset="utf-8">
$sox in.wav out4.wav silence 1 0.1 1% -1 0.1 1%<br>
from :
<a class="moz-txt-link-freetext" href="http://digitalcardboard.com/blog/2009/08/25/the-sox-of-silence/">http://digitalcardboard.com/blog/2009/08/25/the-sox-of-silence/</a><br>
<br>
Does anybody have an idea of what I can do to solve the recording
problem? <br>
Or if someone has a workaround to trim silence it will be really
helpful!<br>
best,<br>
n<br>
<br>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.nimon.org">http://www.nimon.org</a></pre>
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